Introduction: The elderly will experience a decrease in health status caused by either disease or nature, so they are at risk of suffering from hypertension. Hypertension can be controlled by medication adherence. Self-efficacy is a factor that plays an important role in medication adherence. The important role of self-efficacy lies in a person's self-knowledge, which refers to self-confidence in achieving hypertension treatment goals. To identify the relationship between self-efficacy and the level of medication adherence in the elderly with hypertension. Methods: This study used a cross-sectional method with a random sampling technique. The sample of this study was 60 older people in Mejing Wetan. The measuring instrument used was MASES-R to measure self-efficacy and MMAS-8 to measure medication adherence. Univariate analysis used descriptive statistical analysis, while Bivariate analysis with SPSS used the Chi-Square analysis method. There will be a significant relationship if p is < 0.05. Results: The results showed that the respondents' self-efficacy is dominated by the moderate category (41.7%), (73.3%) respondents were disobedient in taking medication, and the significance value was p=0.000. It indicated a significant relationship between self-efficacy and medication adherence as p<0.05. In addition, the correlation results were very strong (r=0.781). Conclusion: There was a strong relationship and a positive direction between self-efficacy and the level of medication adherence in the elderly with hypertension